DISPLAY PANEL AND DISPLAY DEVICE
Provided is a display panel including a substrate, a drive array layer, a light-shielding layer and multiple light-emitting components. The drive array layer is located on a side of the substrate and includes multiple first grooves. The light-shielding layer is located on a side of the drive array layer facing away from the substrate, the light-shielding layer includes multiple first openings, the multiple first openings penetrate through the light-shielding layer, and an orthographic projection of a first groove on the substrate at least partially surrounds an orthographic projection of a respective first opening of the multiple first openings on the substrate. An orthographic projection of a light-emitting component on the substrate at least partially overlaps with an orthographic projection of a respective first opening of the multiple first openings on the substrate. At least part of the light-shielding layer is located within the multiple first grooves.
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This application claims priority to Chinese Patent Application No. 202310567654.1 filed May 18, 2023, the disclosure of which is incorporated herein by reference in its entirety.
TECHNICAL FIELDThe present disclosure relates to the field of display technologies, and in particular to, a display panel and a display device.
BACKGROUNDThe microelement technology refers to an array of micro-sized elements integrated at high density on a substrate. As an emerging display technology, the microelement display has more advantages than a liquid crystal display (LCD) and an organic light-emitting diode (OLED) display, such as lower power consumption, a higher color gamut, and a faster response rate, and the microelement display has lower requirements for encapsulating the water and oxygen isolation. Therefore, a mini light-emitting diode (Mini LED) and a micro light-emitting diode (Micro LED) are considered to be a more promising display technology.
Distinguished from a fabrication manner in which an organic light-emitting diode display panel adopts a film layer deposition, light-emitting elements arranged in a Micro-LED display panel or a Mini LED display panel are mainly implemented by adopting the transfer technology, in a preparation process, the micro-LED is generally transferred to a display substrate by using a light-emitting diode transfer device, however, there are many technical difficulties that need to be overcome at present, such as problems that large amount of transfer is difficult, poor binding easily occurs, the yield of the finished product is low, and the display effect cannot be ensured.
Therefore, it is an urgent technical problem to be solved by those skilled in the art to provide a display panel and a display device which can not only reduce the transfer difficulty of the light-emitting diode, but also facilitate improving the binding yield and ensuring the display quality.
SUMMARYIn view of this, the present disclosure provides a display panel and a display device, so as to solve problems in the existing microelement display technology that large amount of transfer is difficult, poor binding easily occurs, the yield of the finished product is low, and the display effect cannot be ensured.
The present disclosure discloses a display panel. The display panel includes a substrate, a drive array layer, a light-shielding layer and multiple light-emitting components. The drive array layer is located on a side of the substrate and includes multiple first grooves. The light-shielding layer is located on a side of the drive array layer facing away from the substrate, the light-shielding layer includes multiple first openings, the multiple first openings penetrate through the light-shielding layer, and an orthographic projection of a first groove of the multiple first grooves on the substrate at least partially surrounds an orthographic projection of a respective first opening of the multiple first openings on the substrate. An orthographic projection of a light-emitting component of the multiple light-emitting components on the substrate at least partially overlaps with the orthographic projection of the respective first opening of the multiple first openings on the substrate. At least part of the light-shielding layer is located within the multiple first grooves.
Based on the same inventive concept, the present disclosure further discloses a display device, and the display device includes the display panel described above.
The drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present disclosure, and the drawings together with the description thereof serve to explain principles of the present disclosure.
Various exemplary embodiments of the present disclosure will now be described in detail with reference to the drawings. It should be noted that the relative arrangements, numerical expressions, and numerical values of the components and steps set forth in these embodiments do not limit the scope of the present disclosure unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present disclosure, as well as the application or use thereof.
Techniques, methods, and apparatuses known to those of ordinary skill in the art may not be discussed in detail, but such techniques, methods, and apparatuses should, where appropriate, be considered as a part of the specification.
In all instances shown and discussed herein, any specific value is to be interpreted as illustrative only and not as limiting. Therefore, other instances of exemplary embodiments may have different values.
Various modifications and changes in the present disclosure will become apparent to those skilled in the art without departing from the spirit or scope of the present disclosure.
Therefore, the present disclosure is intended to cover modifications and variations of the present disclosure that fall within the scope of the corresponding claims (the claimed technical schemes) and their equivalents. It should be noted that implementations provided in the embodiments of the present disclosure may be combined with each other without conflict.
It should be noted that like reference numerals and letters denote like terms in the following drawings, and therefore, once a certain item is defined in one drawing, no further discussion thereof is required in subsequent drawings.
Referring to
Specifically, the display panel 000 provided in this embodiment may be a mini light-emitting diode (mini LED) display panel or a micro light-emitting diode (micro LED) display panel. A film layer structure of the display panel 000 includes a substrate 10. The substrate 10 may be used as a carrier substrate of the display panel 000 and used for fabricating and disposing a remaining structure of the display panel 000 on the substrate 10, for example, in this embodiment, the substrate 10 may be used for fabricating a film layer structure such as the drive array layer 20, the light-shielding layer 30 and the light-emitting components 40 on the side of the substrate 10. It should be understood that the drive array layer 20 may include a structure of multiple conductive metal layers and multiple insulating layers, the drive array layer 20 may be understood as a film layer for fabricating a driver circuit structure for driving the light-emitting component 40 to emit light, such as a circuit structure for fabricating a thin film transistor 20T for driving the light-emitting component 40 to emit light, and a source or a drain of the thin film transistor 20T is electrically connected to an anode of the light-emitting component 40. The display panel 000 in this embodiment includes multiple light-emitting components 40, and a region in which at least one light-emitting component 40 is located may be understood as a pixel region in which the display panel 000 is divided. It should be understood that in
In this embodiment, the side of the drive array layer 20 facing away from the substrate 10 further includes the light-shielding layer 30. A material for fabricating the light-shielding layer 30 may be an insulating material capable of shielding the light. The specific fabrication material of the light-shielding layer 30 is not limited in this embodiment. The light-shielding layer 30 includes the multiple first openings 301, the multiple first openings 301 penetrate through the light-shielding layer 30. The drive array layer 20 may include a binding layer, the binding layer is located on a side of the drive array layer 20 facing away from the substrate 10, that is, on a side of the light-shielding layer 30 facing the substrate 10, the binding layer is used for fabricating the binding electrode 201 of the subsequent binding light-emitting component 40, the first openings 301 formed in the light-shielding layer 30 are used for exposing the binding electrode 201 of the binding layer, so that after the light-emitting components 40 are subsequently transferred, the orthographic projection of the light-emitting component of the light-emitting components 40 on the substrate 10 at least partially overlaps with the orthographic projection of the respective first opening of the first openings 301 on the substrate 10, in this first opening 301, a cathode and an anode of the light-emitting component 40 are respectively bound with and electrically connected to the binding electrodes 201 exposed by the first openings 301, the source or drain of the thin film transistor 20T in the drive array layer 20 is electrically connected to the anode 401 of the light-emitting component 40, and a cathode signal line in the drive array layer 20 is electrically connected to the cathode 402 of the light-emitting component 40 (it should be understood that, the binding electrode 201 may be electrically connected to the cathode 401 and the anode 402 of the light-emitting component 40 by a conductive structure such as solder or an eutectic layer, which is not illustrated in
In order to achieve a large amount of transfer of microelements such as the light-emitting component 40 of this embodiment, the grown light-emitting component 40 may be transferred to a display substrate on which the fabrication of the film layer such as the drive array layer 20 has been completed by using a microstamp transfer technique. When the light-emitting component 40 is grown on a growth substrate, the light-emitting component 40 is adsorbed by the microstamp and then transferred to the display substrate, because the film layer structure below the light-emitting component 40 is relatively large, the structure of the driver circuit of the drive array layer 20 is relatively complex, and the fluidity of the light-shielding layer 30 around the light-emitting component 40 before uncuring is poor, so that a thickness of the light-shielding layer 30 after curing is relatively thick. In order to facilitate the adsorption of the light-emitting component 40, the microstamp used for transferring is slightly greater than the light-emitting component 40. If a thickness of the light-shielding layer 30 around the first opening 301 is relatively thick, a height of the film layer on the substrate 10 around the first opening 301 is relatively high, and the microstamp is transferred to the light-emitting component 40, then it easily occurs that the binding bonding of the light-emitting component 40 to the binding electrode 201 has not been completed in a process of depressing to the binding electrode 201, and is hindered by the film layer around the first opening 301, the depression operation of the microstamp is interfered, whereby the transfer risk of the light-emitting component 40 is significantly increased, and the binding yield is not improved. In the related art, in order to reduce the interference risk, the first opening 301 of the light-shielding layer 30 is generally opened relatively large, and the edge of the light-shielding layer 30 is far away from the light-emitting component 40, so that enough space for the depression of the microstamp is left. However, after the first opening 301 of the light-shielding layer 30 is extended, the interference risk can be reduced, but an effective shielding area of the light-shielding layer 30 is greatly reduced, and the effect of reducing the reflectivity is greatly affected.
In order to solve the above-described problems, in this embodiment, the drive array layer 20 is provided to include the multiple first grooves 20K1, an orthographic projection of a first groove of the multiple first grooves 20K1 on the substrate 10 at least partially surrounds an orthographic projection of a respective first opening of the multiple first openings 301 on the substrate 10, and optionally, the drive array layer 20 may include multiple metal layers and multiple insulating layers. In this embodiment, the first grooves 20K1 provided in the drive array layer 20 may be understood as the first grooves 20K1 provided in any one or more of the multiple film layers of the drive array layer 20. In
In a specific implementation, the film layer of the first groove 20K1 may be any one or more film layers between the light-shielding layer 30 and the substrate 10, that is, any one or more film layers of the drive array layer 20 are cooperated to form the first groove 20K1, which is not limited here in this embodiment. Since the orthographic projection of the first groove of the multiple first grooves 20K1 on the substrate 10 at least partially surrounds the orthographic projection of the respective first opening of the multiple first openings 301 on the substrate 10, so that the drive array layer 20 in a region where the first groove 20K1 is located may be depressed to a certain extent, and a depression height is the depth of the first groove 20K1. As a result of the arrangement of the first grooves 20K1 in the drive array layer 20, in a fabrication process of the light-shielding layers 30, before the light-shielding layer 30 is not cured, the light-shielding layer 30 flows and is filled to a position where the first groove 20K1 is located by utilizing the good fluidity of the light-shielding layer when the light-shielding layer is not cured, that is, at least part of the light-shielding layer 30 is located in the first groove 20K1, so that a thickness of the light-shielding layer 30 in a region except for the first groove 20K1 may be greatly reduced (in order to clearly illustrate the change in the thickness of the light-shielding layer 30 before the first grooves 20K1 are not provided and after the first grooves 20K1 are provided, a height of the light-shielding layer 30′ before the first groove 20K1 is not provided is indicated by a dotted line in
It should be noted that, in the drawings of this embodiment, only the structure of the display panel is shown exemplarily. In a specific implementation, the structure of the display panel includes but is not limited to this, and other structures capable of implementing the display function may be included. For details, reference may be made to the structures of the mini LED display panel or the micro LED display panel in the related art, and details are not described here in this embodiment.
In an embodiment, as shown in
It should be understood that in
In an embodiment, as shown in
It should be understood that in this embodiment, after the transfer and bonding of the light-emitting component 40 is completed by means of microstamp transfer, the first groove 20K1 is disposed in the drive array layer 20, so that the height of the film layer around the light-emitting component 40 is reduced, whereby it can be effectively ensured that, after the binding bonding, a distance H02 between an upper surface of the light-emitting component 40 and an upper surface of the protective layer 50 in the direction Z perpendicular to the plane where the substrate 10 is located is greater than or equal to 2 μm (as shown in
It should be noted that the width of the first groove 20K1 in the direction Z perpendicular to the plane where the substrate 10 is located is not specifically limited in this embodiment. In a specific implementation, the accommodating space of the first groove 20K1 may be reasonably set according to the thickness of the desired light-shielding layer 30, so that the distance H02 between the upper surface of the light-emitting component 40 and the upper surface of the protective layer 50 in the direction Z perpendicular to the plane where the substrate 10 is located after the light-emitting component 40 is bound and bonded is greater than or equal to 2 μm, and details are not described here in this embodiment.
In some optional embodiments, with continued reference to
This embodiment illustrates that: the first groove 20K1 is provided in a certain film layer or certain more film layers in the drive array layer 20 of the display panel 000, so that the first groove 20K1 is at least partially disposed around the first opening 301 of the light-shielding layer 30, the drive array layer 20 is sunk at a certain distance at a position of the first groove 20K1, at least part of the light-shielding layer 30 is filled in the first groove 20K1, while at least part of the light-shielding layer 30 is located outside the first groove 20K1, and the thickness D1 of the light-shielding layer 30 outside the first groove 20K1 in the direction Z perpendicular to the plane where the substrate 10 is located is less than the thickness D2 of the light-shielding layer 30 in the first groove 20K1 region in the direction Z perpendicular to the plane where the substrate 10 is located, whereby the light-shielding layer 30 maintains a whole structure in the region except for the first opening 301, thereby ensuring the light-shielding performance.
In an embodiment, with continued reference to
This embodiment illustrates that when at least part of the light-shielding layer 30 is located in the region except for the first groove 20K1, the light-shielding layer 30 is disposed not only on a side of the first groove 20K1 facing away from the light-emitting component 40, it is also ensured that the side of the first groove 20K1 facing to the light-emitting component 40 is also at least partially provided with the light-shielding layer 30, that is, the orthographic projection of the light-shielding layer 30 on the plane where the substrate 10 is located is at least partially located between the orthographic projection of the first groove 20K1 on the plane where the substrate 10 is located and the orthographic projection of the light-emitting component 40 on the plane where the substrate 10 is located, which is equivalent to further increasing the shielding area of the light-shielding layer 30 to achieve the better light-shielding effect, while further improving the display quality of the display panel 000.
In some optional embodiments, reference is made to
This embodiment illustrates that the same first groove 20K1 disposed at least partially around the first opening 301 may be differentially designed at different positions, and the same first groove 20K1 may include the first portion 20K11 and the second portion 20K12. The first portion 20K11 and the second portion 20K12 may be located at different positions around the same light-emitting component 40, and the first portion 20K11 and the second portion 20K12 may be two portions of the same first groove 20K1 communicating with each other, or the first portion 20K11 and the second portion 20K12 may be two portions of the same first groove 20K1 not communicating with each other. This embodiment is not limited thereto, it is only necessary to satisfy that the same first groove 20K1 disposed at least partially around the first opening 301 includes the first portion 20K11 and the second portion 20K12 located at different positions.
As shown in
As shown in
As shown in
In an embodiment, as shown in
In an embodiment, as shown in
This embodiment illustrates that the same first groove 20K1 disposed at least partially around the first opening 301 may be differentially designed in depth and width at different positions, as shown in
It should be understood that the distance D3 between the orthographic projection of the first portion 20K11 on the substrate 10 and the orthographic projection of the thin film transistor 20T on the substrate 10 in this embodiment may be a shortest distance between the orthographic projection of the first portion 20K11 on the substrate 10 and the orthographic projection of the thin film transistor 20T on the substrate 10 in the direction parallel to the plane where the substrate 10 is located, as shown in
In some optional embodiments, reference is made to
This embodiment illustrates that the same first groove 20K1 disposed at least partially around the first opening 301 may be differentially designed at different positions, and the same first groove 20K1 may include the first portion 20K11 and the second portion 20K12. The first portion 20K11 and the second portion 20K12 may be located at different positions around the same light-emitting component 40, and the first portion 20K11 and the second portion 20K12 may be two portions of the same first groove 20K1 communicating with each other, or the first portion 20K11 and the second portion 20K12 may be two portions of the same first groove 20K1 not communicating with each other. This embodiment is not limited thereto, it is only necessary to satisfy that the same first groove 20K1 disposed at least partially around the first opening 301 includes the first portion 20K11 and the second portion 20K12 located at different positions, and that the depth and/or width of the first portion 20K11 and the depth and/or width of the second portion 20K12 may be differently designed.
As shown in
As shown in
As shown in
In some optional embodiments, reference is made to
This embodiment illustrates that the first grooves 20K1 provided in the drive array layer 20 and at least partially surrounding the first opening 301 may be multiple independent strip-like structures, as shown in
In some optional embodiments, reference is made to
This embodiment illustrates that the first groove 20K1 provided in the drive array layer 20 and at least partially surrounding the first opening 301 may be the annular structure, that is, a shape of the orthographic projection of the first groove 20K1 on the substrate 10 is annular. The orthographic projection of the annular first groove 20K1 on the substrate 10 may surround the orthographic projection of one light-emitting component 40 on the substrate 10. The orthographic projection of the annular first groove 20K1 on the substrate 10 may be surround an orthographic projection of a respective light-emitting component of multiple light-emitting components 40 on the substrate 10 (as shown in
In an embodiment, reference is made to
It should be understood that in
It should be understood that, in this embodiment, at least two sub-grooves are disposed at the periphery of the at least one light-emitting component 40 together to form the first groove 20K1, and the third sub-groove 20K11-1 and the fourth sub-groove 20K11-2 may be provided in a structure that is not continuous with each other, as shown in
In an embodiment, as shown in
In an embodiment, as shown in
In other some optional embodiments, as shown in
In an embodiment, when the film structure of the display panel 000 of this embodiment is fabricated, the drive array layer 20 includes at least a first inorganic layer PV1. The first inorganic layer PV1 may cover the thin film transistor 20T. Before the light-shielding layer 30 is fabricated, a second inorganic layer PV2 may be formed between the light-shielding layer 30 and the planarization layer (the first insulating layer 20A illustrated in
It should be understood that when cross-sectional shapes of the third sub-groove 20K11-1 and the fourth sub-groove 20K11-2 included in the first groove 20K1 are both trapezoid-shaped (i.e., a structure in which the top opening of the groove is narrow and the bottom surface of the groove is wide) as shown in
It should be understood that when the first groove 20K1 in this embodiment includes multiple sub-grooves of different depths, such as, two third sub-grooves 20K11-1 having a relatively deep depth and one fourth sub-groove 20K11-2 having a relatively shallow depth, during the fabrication process, it is possible to firstly form one fourth sub-groove 20K11-2 having a relatively shallow depth and two spare sub-grooves 20K11-2 having a depth consistent with a depth of the fourth sub-grooves 20K11-2 by one etching, and then perform a second etching at the two spare sub-grooves to form two third sub-grooves 20K11-1 having a relatively deep depth. Alternatively, the third sub-groove 20K11-1 and the fourth sub-groove 20K11-2 having different depths may be formed by a halftone mask process, and this embodiment is not limited herein.
In some optional embodiments, reference is made to
This embodiment illustrates that the first groove 20K1 provided in the drive array layer 20 and at least partially surrounding the first opening 301 may be the annular structure, that is, a shape of the orthographic projection of the first groove 20K1 on the substrate 10 is annular. An orthographic projection of an annular first groove of the multiple annular first grooves 20K1 on the substrate 10 may surround orthographic projections of different numbers of light-emitting components 40 on the substrate 10, specifically, the multiple first grooves 20K1 includes at least the first sub-groove 20K1A and the second sub-groove 20K1B, the orthographic projection of the first sub-groove 20K1A on the substrate 10 surrounds the orthographic projection of one light-emitting component of the multiple light-emitting components 40 on the substrate 10. The orthographic projection of the second sub-groove 20K1B on the substrate 10 surrounds the orthographic projections of two light-emitting components of the multiple light-emitting components 40 on the substrate 10. The orthographic projection of the first sub-groove 20K1A on the substrate 10 at least partially overlaps with the orthographic projection of the second sub-groove 20K1B on the substrate 10, that is, the first sub-groove 20K1A and the second sub-groove 20K1B may share an edge. The multiple light-emitting components 40 included in the display panel 000 may include three light-emitting components 40 of different colors, and every three light-emitting components 40 of different colors may form a group, and an orthographic projection of one annular first sub-groove 20K1 on the substrate 10 may be disposed around the light-emitting components 40 of one color in the group, an orthographic projection of one annular second sub-groove 20K1B on the substrate 10 may be disposed around the light-emitting components 40 of the other two colors in the group, so that different transfer manners may be accommodated during the transfer fabrication process of the light-emitting component 40, the interference problem in the transfer process is improved, the transfer efficiency and the binding yield are ensured, the difficulty in the fabrication process of providing the first groove 20K1 in the drive array layer 20 is reduced, and thus the fabrication process efficiency is improved.
In some optional embodiments, reference is made to
This embodiment illustrates that it is generally necessary to provide multiple signal lines in the display panel 000, and the signal lines are used for transmitting, for the display panel 000, signal values for driving the light-emitting and display thereof. The drive array layer 20 may include multiple conductive metal layers, and the signal lines may be fabricated using one or more conductive film layers of the drive array layer 20. The drive array layer 20 in this embodiment may include multiple first signal lines 202, the first signal line 202 may be a scan line connected to a gate of the thin film transistor 20T, or an anode signal line connected to one of a source or a drain of the thin film transistor 20T, or the first signal line 202 may be a cathode signal line, and at this time, the first signal line 202 may be fabricated at the same layer as the binding electrode 202 and may be electrically connected to the cathode 402 of the light-emitting component 40 through the binding electrode 201 for supplying a cathode drive signal to the cathode 402 of the light-emitting component 40. In other some optional embodiments, the cathode signal line may be formed at a different layer from the binding electrode 202, and this embodiment is not particularly limited. An example in which the first signal line 202 is a cathode signal line is used for exemplary description in
In some optional embodiments, reference is made to
This embodiment illustrates that the first grooves 20K1 provided at least partially around the first opening 301 may be differentially designed at different positions, the first grooves 20K1 may include the first region 20K1-1 and the second region 20K1-2 located at different positions, and the first region 20K1-1 and the second region 20K1-2 may be at different positions around the same light-emitting component 40, and the first region 20K1-1 and the second region 20K1-2 may also be at different positions around different light-emitting components 40, which is not limited in this embodiment. In the direction Z perpendicular to the plane where the substrate 10 is located, the depth H-1 of the first groove 20K1 in the first region 20K1-1 is greater than the depth H-2 of the first groove 20K1 in the second region 20K1-2. As shown in the above-described embodiments, the position closer to the thin film transistor 20T or to the light-emitting component 40 may be understood as the first region 20K1-1 of the first groove 20K1, which is disposed in the direction Z perpendicular to the plane where the substrate 10 is located, and the depth H-1 of the first groove 20K1 in the first region 20K1-1 is greater than the depth H-2 of the first groove 20K1 in the second region 20K1-2, so that the filling space of the light-shielding layer 30 at the deeper position may be enhanced and the light-shielding effect may be improved, and reference may be made in detail to the description of the above-described embodiments. This embodiment further provides that the first signal line 202 does not overlap the first groove 20K1 in the first region 20K1-1, and that at least a partial segment of the first signal line 202 in the first region 20K1-1 partially overlaps with the first groove 20K1 of the region only in the second region 20K1-2 of the shallow depth position, the wiring of the first signal line 202 may be made to avoid the deeper first region 20K1-1, in turn, it may be avoided that the first signal line 202 causes a risk of breaking when the first signal line 202 runs ramping in the first groove 20K1 in the first region 20K1-1, and thus the first signal line 202 provided in this embodiment does not overlap with the first groove 20K1 in the first region 20K1-1, and it is advantageous to ensure the stability of the signal transmission on the first signal line 202.
In some optional embodiments, with continued reference to
In this embodiment, the first groove 20K1 is located at the first insulating layer 20A, and the first groove 20K1 is fabricated by a single layer of the first insulating layer 20A, so that the sinking of the light-shielding layer 30 and the protective layer 50 can be achieved by one first insulating layer 20A, the film layer involved in grooving is less, and the fabrication process may be simplified.
In an embodiment, as shown in
In an embodiment, as shown in
It should be understood that the first insulating layer 20A may also be understood as the insulating layer between other conductive layers in the drive array layer 20, and details are not described here in this embodiment.
In some optional embodiments, reference is made to
This embodiment illustrates that when the first groove 20K1 provided in the drive array layer 20 is made of a single insulating layer such as the first insulating layer 20A (an example in which the first insulating layer 20A provided with the first groove 20K1 is used as the planarization layer closest to the light-shielding layer 30 is used for exemplary description in the drawings of this embodiment), the depth H of the first groove 20K1 may be less than the thickness D of the first insulating layer 20A in the direction Z perpendicular to the plane where the substrate 10 is located, that is, as shown in
In some optional embodiments, reference is made to
This embodiment illustrates that the first groove 20K1 provided in the drive array layer 20 may be made of at least two insulating layers such as the first insulating layer 20A and the second insulating layer 20B. In the drawings of this embodiment, an example in which the first insulating layer 20A provided with the first groove 20K1 is a planarization layer closest to the light-shielding layer 30, and the second insulating layer 20B is an interlayer insulating layer between the second metal layer M2 and the first metal layer M1 is used for exemplary description. The second insulating layer 20B is located on a side of the first insulating layer 20A facing the substrate 10. The first groove 20K1 provided around the first opening 301 includes the first hollow portion 20K101 located in the first insulating layer 20A and the second hollow portion 20K102 located in the second insulating layer 20B. In the direction Z perpendicular to the plane where the substrate 10 is located, the first hollow portion 20K101 and the second hollow portion 20K102 overlap with each other to form a sinking space, and the sinking space is used for accommodating the filling space of the light-shielding layer 30. In this embodiment, at least two insulating layers cooperate to form the first groove 20K1 in a superimposed manner, the depth of the first grooves 20K1 is more controllable. For example, the first groove 20K1 is provided by the at least two insulating layers at a position where a strong light-shielding effect is required, so that the depth of the first grooves 20K1 may be increased, the fillable space of the light-shielding layer 30 may be enlarged, and the light-shielding performance of the light-shielding layer 30 filled in the first groove 20K1 may be improved while further reducing the distance between a surface of a side of the light-shielding layer 30 facing away from the substrate 10 and the substrate 10.
In this embodiment, in the direction Z perpendicular to the plane where the substrate 10 is located, the depth of the first hollow portion 20K101 is less than or equal to the thickness D01 of the first insulating layer 20A, and the depth of the second hollow portion 20K102 is less than or equal to the thickness D02 of the second insulating layer 20B.
As shown in
Or, as shown in
Or, as shown in
Or, as shown in
In an embodiment, as shown in
In an embodiment, as shown in
This embodiment illustrates that the side wall 20K1C of the first groove 20K1 provided in the drive array layer 20 may be beveled (as shown in
In some optional embodiments, with continued reference to
This embodiment illustrates that the first groove 20K1 provided in the drive array layer 20 may be disposed to avoid an insulating layer below a film layer in which the active portion 20TP of the thin film transistor 20T is located, that is, in the direction Z perpendicular to the plane where the substrate 10 is located, the first groove 20K1 is located on a side where the film layer where the active portion 20TP is located facing away from the substrate 10, so that when the insulating layer below the active portion 20TP is provided with the first groove 20K1, it is avoided that the active portion 20TP is prone to sinking unevenness, which affects the characteristics of the thin film transistor 20T itself. Therefore, the first groove 20K1 is located on a side of a film layer where the active portion 20TP is located facing away from the substrate 10, which is advantageous for ensuring the drive performance of the thin film transistor 20T in the drive array layer 20 and ensuring the display uniformity of the display panel 000.
In some optional embodiments, reference is made to
The display panel 000 in this embodiment may be a transparent display panel, for example, the display panel 000 includes a transparent region TA and a non-transparent region NTA, the light-emitting component 40 is located in the non-transparent region NTA, a region other than the light-emitting component 40 may be formed into the transparent region TA by digging a hole, a side of a substrate 10 of the transparent region TA may be formed into the transparent region TA by providing a second opening LK, and the second opening LK penetrates through a film layer on a side of the substrate 10 in a direction facing to the substrate 10 to form the transparent region TA. The second opening LK is filled with the transparent material, so that the flatness of the film layer of the whole display panel can be ensured. This embodiment illustrates that the first grooves 20K1 provided in the light-shielding layer 30 and the drive array layer 20 may be both located in the non-transparent region NTA, so that the binding yield and the transfer efficiency of the light-emitting component 40 in the transparent display panel can be ensured, and the display quality of the transparent display panel can also be improved.
It should be understood that the arrangement of the transparent region TA and the non-transparent region NTA in the display panel 000 is merely illustrated in
In some optional embodiments, reference is made to
This embodiment illustrates that the display panel 000 is a transparent display panel. When the transparent region TA is provided with the second opening LK penetrating above the substrate 10, the light-shielding layer 30 covers at least part of side wall of the second opening LK (as shown in
In some optional embodiments, reference is made to
This embodiment illustrates that the drive array layer 20 further includes the second groove 20K2, the second groove 20K2 may be disposed in the non-transparent region NTA, and an orthographic projection of the second groove 20K2 on the substrate 10 at least partially surrounds an orthographic projection of the second opening LK of the transparent region TA on the substrate 10. The drive array layer 20 may include multiple metal layers and multiple insulating layers. In this embodiment, the second groove 20K2 provided in the drive array layer 20 may be understood to be a second groove 20K2 provided in any one or more of the multiple film layers of the drive array layer 20, and further, the second groove 20K2 and the first groove 20K1 may be made of the same film layer. In the drawings of this embodiment, an example in which the film layers of the first groove 20K1 and the second groove 20K2 are provided as the planarizing layer facing to the light-shielding layer 30 is used for exemplary description. After the structure such as the driver circuit of the drive array layer 20 is fabricated and completed, an insulating planarizing layer needs to be provided to planarize the fabricated film layers of the subsequent light-shielding layer 30. In a specific implementation, the opening film layers of the first groove 20K1 and the second groove 20K2 may be any one or more film layers between the light-shielding layer 30 and the substrate 10, that is, any one or more film layers of the drive array layer 20 cooperate to form the first groove 20K1 and the second groove 20K2, and this embodiment is not limited herein.
According to this embodiment, the orthographic projection of the second groove 20K2 on the substrate 10 at least partially surrounds the orthographic projection of the second opening LK on the substrate 10, so that the drive array layer 20 in the region where the second groove 20K2 is located may be depressed to a certain extent, and the height of the depression is the depth of the second groove 20K2. Since the second groove 20K2 in the drive array layer 20 is disposed so that during the fabrication process of the light-shielding layer 30, the light-shielding layer 30 is flowed and filled to the position of the second groove 20K2 by virtue of good fluidity when it is not cured, that is, at least part of the light-shielding layer 30 is located within the second grooves 20K2, it is possible to prevent the light-shielding layer 30 from extending to the position of the transparent region TA due to overflow or overflow before it is not cured, thereby affecting the area of the transparent region TA and being conductive to ensuring the transparent display effect.
It should be understood that the opening film layer of the second groove 20K2 in this embodiment may be the same as the opening film layer of the first groove 20K1, and the opening shape of the second groove 20K2 may be the same as or different from the first groove 20K1, so long as the second groove 20K2 can slow down the flow rate of the light-shielding layer 30 to the transparent region TA before the light-shielding layer 30 is cured, this embodiment is not specifically limited herein.
In some optional embodiments, referring to
This embodiment illustrates that the drive array layer 20 is provided with the first groove 20K1 and the second groove 20K2, the first groove 20K1 and the second groove 20K2 may be disposed in the non-transparent region NTA, an orthographic projection of the second groove 20K2 on the substrate 10 at least partially surrounds an orthographic projection of the second opening LK on the substrate 10, the orthographic projection of the first groove of the multiple first grooves 20K1 on the substrate 10 at least partially surrounds the orthographic projection of the respective first opening of the multiple first openings 301 on the substrate 10, and the width and depth of the first groove 20K1 and the second groove 20K2 may be designed differently. As shown in
In some optional embodiments, referring to
As can be seen from the above-described embodiments, the display panel and the display device provided in the present disclosure have at least the following beneficial effects.
The display panel provided in the present disclosure includes a substrate, the substrate is used as a carrier substrate for fabricating a film layer structure such as the drive array layer, the light-shielding layer, and the light-emitting component on a side of the substrate. The drive array layer may be understood as a film layer for fabricating a driver circuit structure for driving the light-emitting component to emit light, such as a circuit structure for fabricating a thin film transistor for driving the light-emitting component to emit light. A side of the drive array layer facing away from the substrate includes the light-shielding layer. A material for fabricating the light-shielding layer may be a material which is insulated and capable of shielding light. The light-shielding layer includes the multiple first openings. The first openings penetrate through the light-shielding layer. The first openings are used for exposing binding electrodes of a binding layer, so that after the subsequent light-emitting component is transferred, in this first opening, a cathode and an anode of the light-emitting component are respectively bound with and electrically connected to the binding electrodes exposed by the first openings. The light-shielding layer is provided with the first opening only at a position where the light-emitting component needs to be bound, and remaining regions are shielded by a material of the light-shielding layer, so that the screen reflectivity can be effectively reduced, and the influence of external light on the display effect of the display panel can be avoided. In the present disclosure, the drive array layer is set to include the multiple first grooves, the orthographic projection of the first groove of the multiple first grooves on the substrate at least partially surrounds the orthographic projection of the respective first opening of the multiple first openings on the substrate, so that the drive array layer in a region in which the first grooves are located may be depressed to a certain extent, and a depression height is the depth of the first groove. In a fabrication process of the light-shielding layers, before the light-shielding layer is not cured, the light-shielding layer flows and is filled to a position where the first groove is located by utilizing the good fluidity of the light-shielding layer when the light-shielding layer is not cured, so that a thickness of the light-shielding layer in a region outside the first groove may be greatly reduced, and further, a problem of bonding interference at the time of transfer due to the higher film layer height around the light-emitting components may be improved, the risk of interference between the microstamp and film layers around the light-emitting components in a depression process of using the microstamp to transfer the light-emitting components can be reduced, the transfer efficiency of the light-emitting components and the subsequent binding yield with the binding electrode can be improved, and thus the display quality can be ensured.
While some specific embodiments of the present disclosure have been described in detail by way of instance, it should be understood by those skilled in the art that the above instances are for purposes of illustration only and are not intended to limit the scope of the present disclosure. It should be understood by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.
Claims
1. A display panel, comprising:
- a substrate;
- a drive array layer, wherein the drive array layer is located on a side of the substrate and comprises a plurality of first grooves;
- a light-shielding layer, wherein the light-shielding layer is located on a side of the drive array layer facing away from the substrate, the light-shielding layer comprises a plurality of first openings, the plurality of first openings penetrate through the light-shielding layer, and an orthographic projection of a first groove of the plurality of first grooves on the substrate at least partially surrounds an orthographic projection of a respective first opening of the plurality of first openings on the substrate; and
- a plurality of light-emitting components, an orthographic projection of a light-emitting component of the plurality of light-emitting components on the substrate at least partially overlaps with an orthographic projection of a respective first opening of the plurality of first openings on the substrate;
- wherein at least part of the light-shielding layer is located within the plurality of first grooves.
2. The display panel of claim 1, wherein at least part of the light-shielding layer is located outside the plurality of first grooves;
- outside a region where the plurality of first grooves are located, a thickness of the light-shielding layer in a direction perpendicular to a plane where the substrate is located is D1; and
- in the region where the plurality of first grooves are located, a thickness of the light-shielding layer in the direction perpendicular to the plane where the substrate is located is D2, wherein D1<D2.
3. The display panel of claim 2, wherein at least part of the light-shielding layer is located on a side of a first groove of the plurality of first grooves facing to a respective one of the plurality of light-emitting components.
4. The display panel of claim 1, wherein a same first groove among the plurality of first grooves comprises a first portion and a second portion, and the first portion and the second portion satisfy at least one of:
- in a direction perpendicular to a plane where the substrate is located, a depth of the first portion is different from a depth of the second portion; or
- in a direction parallel to a plane where the substrate is located and along a direction in which the same first groove is directed towards the light-emitting component, a width of the first portion is different from a width of the second portion.
5. The display panel of claim 4, wherein the first portion and the second portion satisfy at least one of:
- in the direction parallel to the plane where the substrate is located and along the direction in which the same first groove is directed towards the light-emitting component, the width of the first portion is greater than the width of the second portion; or
- in the direction perpendicular to the plane where the substrate is located, the depth of the first portion is greater than the depth of the second portion;
- the drive array layer comprises a plurality of thin film transistors, a distance between an orthographic projection of the first portion on the substrate and an orthographic projection of a thin film transistor of the plurality of thin film transistors on the substrate is D3, and a distance between an orthographic projection of the second portion on the substrate and the orthographic projection of the thin film transistor on the substrate is D4, wherein D3<D4.
6. The display panel of claim 4, wherein,
- in the direction parallel to the plane where the substrate is located, a shortest distance from the first portion to the light-emitting component is L1, and a shortest distance from the second portion to the light-emitting component is L2;
- in the direction parallel to the plane where the substrate is located and along the direction in which the first groove is directed towards the light-emitting component, the width of the first portion is W1, and the width of the second portion is W2; and
- in the direction perpendicular to the plane where the substrate is located, the depth of the first portion is H1, and the depth of the second portion is H2,
- wherein at least one of following formulas is satisfied: (L1−L2)×(W1−W2)<0, or (L1−L2)×(H1−H2)<0.
7. The display panel of claim 1, wherein,
- the orthographic projection of the first groove on the substrate is a strip-like structure;
- in a direction parallel to a plane where the substrate is located, the first groove is located between two adjacent light-emitting components of the plurality of light-emitting components.
8. The display panel of claim 1, wherein,
- the orthographic projection of the first groove on the substrate is an annular structure; and
- the orthographic projection of the first groove on the substrate surrounds an orthographic projection of at least one of the plurality of light-emitting components on the substrate.
9. The display panel of claim 8, wherein the plurality of first grooves comprise at least a first sub-groove and a second sub-groove, an orthographic projection of the first sub-groove on the substrate surrounds an orthographic projection of one light-emitting component of the plurality of light-emitting components on the substrate, and an orthographic projection of the second sub-groove on the substrate surrounds orthographic projections of two light-emitting components of the plurality of light-emitting components on the substrate; and
- the orthographic projection of the first sub-groove on the substrate at least partially overlaps with the orthographic projection of the second sub-groove on the substrate.
10. The display panel of claim 1, wherein the drive array layer comprises a plurality of first signal lines, at least a partial segment of a first signal line of the plurality of first signal lines overlaps with a respective first groove of the plurality of first grooves in a direction perpendicular to a plane where the substrate is located,
- wherein a first groove of the plurality of first grooves comprises a first region and a second region;
- in the direction perpendicular to the plane where the substrate is located, a depth of the first groove in the first region is greater than a depth of the first groove in the second region, and the first signal line does not overlap with the first groove in the first region.
11. The display panel of claim 1, wherein the drive array layer comprises at least a first insulating layer, and the plurality of first grooves are located in the first insulating layer, wherein no other insulating layer is comprised between the first insulating layer and the light-shielding layer.
12. The display panel of claim 11, wherein a depth of the first groove is less than or equal to a thickness of the first insulating layer in a direction perpendicular to a plane where the substrate is located.
13. The display panel of claim 1, wherein the drive array layer comprises at least a first insulating layer and a second insulating layer, the second insulating layer is located on a side of the first insulating layer facing the substrate; and
- the first groove comprises a first hollow portion located in the first insulating layer and a second hollow portion located in the second insulating layer, and the first hollow portion and the second hollow portion overlap with each other in a direction perpendicular to a plane where the substrate is located,
- wherein in the direction perpendicular to the plane where the substrate is located, a depth of the first hollow portion is less than or equal to a thickness of the first insulating layer, and a depth of the second hollow portion is less than or equal to a thickness of the second insulating layer.
14. The display panel of claim 1, wherein a side wall of the first groove comprises one of a beveled shape or a stepped shape.
15. The display panel of claim 1, wherein the drive array layer comprises a plurality of thin film transistors, a thin film transistor of the plurality of thin film transistors comprises an active portion, and the first groove is located on a side of a film layer on which the active portion is located facing away from the substrate.
16. The display panel of claim 1, wherein the display panel comprises a transparent region and a non-transparent region, the plurality of light-emitting components are located in the non-transparent region, and a side of the substrate in the transparent region comprises a second opening;
- the second opening penetrates through a film layer on the side of the substrate in a direction facing to the substrate, and the second opening is filled with a transparent material.
17. The display panel of claim 16, wherein the light-shielding layer covers at least a part of a side wall of the second opening.
18. The display panel of claim 16, wherein the drive array layer further comprises a second groove, an orthographic projection of the second groove on the substrate at least partially surrounds an orthographic projection of the second opening on the substrate; and
- at least a part of the light-shielding layer is located within the second groove.
19. The display panel of claim 18, wherein the second groove and the first groove satisfy at least one of:
- in a direction perpendicular to a plane where the substrate is located, a depth of the second groove is greater than a depth of the first groove; or
- in a direction parallel to a plane where the substrate is located and along the direction in which the first groove is directed towards the light-emitting component, a width of the first groove is W01; and
- in a direction parallel to a plane where the substrate is located and along a direction in which the second groove is directed towards the transparent region, a width of the second groove is W02, wherein W02>W01.
20. A display device comprising a display panel,
- wherein the display panel, comprises: a substrate; a drive array layer, wherein the drive array layer is located on a side of the substrate and comprises a plurality of first grooves; a light-shielding layer, wherein the light-shielding layer is located on a side of the drive array layer facing away from the substrate, the light-shielding layer comprises a plurality of first openings, the plurality of first openings penetrate through the light-shielding layer, and an orthographic projection of a first groove of the plurality of first grooves on the substrate at least partially surrounds an orthographic projection of a respective first opening of the plurality of first openings on the substrate; and a plurality of light-emitting components, an orthographic projection of a light-emitting component of the plurality of light-emitting components on the substrate at least partially overlaps with an orthographic projection of a respective first opening of the plurality of first openings on the substrate; wherein at least part of the light-shielding layer is located within the plurality of first grooves.
Type: Application
Filed: Oct 16, 2023
Publication Date: Feb 1, 2024
Applicant: Tianma Advanced Display Technology Institute (Xiamen) Co., Ltd. (Xiamen)
Inventors: Feifei AN (Xiamen), Sitao HUO (Xiamen)
Application Number: 18/380,346